Eigenmann: The Serrasalmin^e and Mylin^. 



271 



The color of (he young is very similar to the color of the young of 

 Myleus pacu. 



40. Myloplus rubripinnis (Miiller & Troschel). 

 5745 a-g. C. M. 54-87 nun. Rio Jauru, June 3, 1909. Haseman. 



5746 a. C. M. 80 mm. 



1909. Haseman. 



D. 28; A. 35; serrae 42 

 5753 a. C. M. 70 mm. 

 6534 a. C. M. 75 mm. 



Cachocle de Riberao, Madeira, Oct. 18, 



Maciel, July 23, 1909. Haseman. 

 Alcobaga, Jan. 10, 1910. Haseman. 

 Depth a little greater than the length of the body, counting from 

 the end of the scales at the base of the caudal; base of dorsal about 

 equal to the length of the anal; adipose 2.5 in the eye, second sub- 

 orbital about equal to first; more than half the cheek naked. 



41. Myloplus schomburgki (Jardine). (Plates LVI and LVH.) 



5747 a. C. M. One, 135 mm. Manaos, Nov. 28, 1909. Haseman, 



5748 a-/?. C. M. Eight, cf and 9, 150-200 mm. Santarem, Dec. 

 15, 1909. Haseman. 



Depth about 1.5; head 3.5; D. 25 or 26; A. 34-36; serrae 33-36; 

 interorbital 2-2.25 in the head; eye 2.5-2.75 in head, equal to the 

 postorbital portion of the head. 



Dorsal and anal falcate, the anal two-lobed in the male; anal lobe 

 and dorsal lobe very narrow, adipose fin longer than its distance from 



the dorsal. 



42. Myloplus rhomboidalis (Cuvier). 



5754 a. C. M. One, 165 mm. Manaos, Nov. 16, 1909. Haseman. 



5755 a. C. M. One, 90 mm. Cochoele de Riberao de Rio Madeira, 

 Oct. 18, 1909. Haseman. 



These differ from specimens from Guiana in having the second 

 suborbital longer than the first; depth less than the length without 

 head; dorsal shorter than anal; adipose .6-1 in eye. 



43. Myloplus levis (Eigenmann & McAtee). 



5743 a. C. M. Corumba, April 28, 1909. Haseman. 



D. 31; A. 36; serr^ 40. Depth less than length of body; adipose 

 2.5 in eye; base of dorsal greater than base of anal; anterior teeth 

 close to posterior; first suborbital longer than second. 





